Can't display ASP page problem

I'm running IIS 5.1 in Windows XP Pro. I moved all my ASP files and scripts from my backup CD to my new server.

Some of the pages can't be displayed, the browser would redirect me to Http://www.perfectnav.com/....uid.... web search engine page. How can I stop this? I mean I couldn't fix the problem if I don't see actual error of the page.

I open my IIS logfile and found Error 500 next to the request.
But the HTTP 500 error page never get displayed.
I turned off the "Display Friendly Error Message" in Internet Option and set all the 500 error page to default.

But the http://www.perfectnav.com... search engine page keep poping up. Can anyone help? Thx.

This could be several things:
* There is some code in your ASP file that is causing a redirect
* There is some dodgy software (i.e. virus, adware) installed on the server.
* Alternatively, check the error files directory (open IIS, properties of the virtual domain, custom errors tab) to see if the error 500 page has been edited to redirect to the domain you mentioned.

I do not find any code in my ASP which it redirect to that search engine site.
My norton anti-v can't detect any virus in my system
I double checked custom error and all the 500 error is set to default.

I found DeskTop.ini in my system folder, server extension bin folder and in the wwwroot

Here is the content of the DeskTop.ini
[.ShellClassInfo]
IconFile=_vti_pvt/fpdbw.ico
IconIndex=0
ConfirmFileOp=0
InfoTip=Stores your local web site

Do a search on all your files on the server containing the text "perfectnav".